Europe Migrant Crisis - Sept. 10, 2015

A boy passes from the northern Greek village of Idomeni to southern Macedonia as other refugees and migrants wait, Sept. 10, 2015. Thousands of people, including many families with young children, braved torrential downpours to cross Greece’s northern border with Macedonia, after Greek authorities managed to register about 17,000 people on the island of Lesbos, allowing them to continue their journey north into Europe.

Macedonian policemen try to keep migrants and refugees under control before they cross the border line from Greece into Macedonia, near the Greek village of Idomeni. Most of the people flooding into Europe are fleeing violence and persecution in their home countries and have a legal right to seek asylum, the United Nations said.

A Syrian refugee kisses his son as he walks through a rainstorm towards Greece's border with Macedonia, near the Greek village of Idomeni.

A group of migrants try to go through police blockades at Gevgelija, in Macedonia, after crossing the border from Greece. Macedonia is considering building a Hungarian-style border fence to stem a rising influx of migrants from the south, Foreign Minister Nikola Poposki was quoted as saying.

Syrian refugees swim towards a beach after abandoning a dinghy with a broken engine on the Greek island of Lesbos, Sept. 9, 2015. Greece asked the European Union for aid to prevent it being overwhelmed by refugees, as a minister said arrivals on Lesbos had swollen to three times as many as the island could handle.

Austrian police say more than 3,000 migrants crossed into Austria overnight at Nickelsdorf, the main border point with Hungary.

Migrants and refugees wait in Nickelsdorf, Austria, at the border between Hungary and Austria.

Migrants wait for trains at the Wien Westbahnhof in Vienna, Austria. A police spokesman said a big increase in the flow of migrants will put extra pressure on authorities trying to arrange onward transport to Germany.

Migrants cross the Serbian-Hungarian border at the railway track near Roszke, southern Hungary. Leaders of the United Nations refugee agency warned that Hungary faces a bigger wave of 42,000 asylum seekers in the next 10 days and will need international help to provide shelter on its border.

This handout picture released by Society 4 Climate Chnage Communication Sierra Leone, shows flooded streets in Regent near Freetown.

In Sweden, volunteers distribute food and drinks to migrants who arrived at Malmo train station.

About 33,000 asylum seekers have arrived at Munich's main railway station since the beginning of September. Children of refugee families play in the kindergarden of former U.S. army housing barracks used as a refugee registration center for the state of Hesse in Giessen, 40km southwest of Frankfurt.

German Chancellor Angela Merkel visits a refugee camp near the Federal Office for Migration and Refugees at Berlin's Spandau district. A migrant takes a selfie with Merkel outside the refegee camp.

Children of migrants play with soap bubbles after arriving at a new emergency shelter in a sports hall near the Olympiastadion in Berlin, Germany.